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知道三角形的三條邊,那麼這個三角形就確定了. 根據大邊對大角,小邊對小角的原則,知道最小角必定是邊長為3對應的角. 再根據三角定理就知道角度了.由arcsin3/5 =37度知道. 不知道你是幾年級的,初三應該就會有了.但我們老師是要我們記住這個角度.
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